FR2218025A5 - Bicarbonate ion determn appts - by photoelectric detection of equivalence point in colorimetric titration - Google Patents

Bicarbonate ion determn appts - by photoelectric detection of equivalence point in colorimetric titration

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Publication number
FR2218025A5
FR2218025A5 FR7304901A FR7304901A FR2218025A5 FR 2218025 A5 FR2218025 A5 FR 2218025A5 FR 7304901 A FR7304901 A FR 7304901A FR 7304901 A FR7304901 A FR 7304901A FR 2218025 A5 FR2218025 A5 FR 2218025A5
Authority
FR
France
Prior art keywords
appts
sample
determn
photoelectric detection
colorimetric titration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR7304901A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAHMS HARALD US
Original Assignee
DAHMS HARALD US
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DAHMS HARALD US filed Critical DAHMS HARALD US
Priority to FR7304901A priority Critical patent/FR2218025A5/en
Application granted granted Critical
Publication of FR2218025A5 publication Critical patent/FR2218025A5/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
    • G01N31/162—Determining the equivalent point by means of a discontinuity

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

Appts. comprises a containers for the acidified sample, means for removing CO2 formed during acidification, device for the colorimetric titration of the sample by the passage of an electric current through the sample via a cathode and an anode; a pH-indicator with colour differences at acidic and basic pH, means for passing light through the sample the light intensity corresp. to the colour conc. of the indicator, photoelectric detector which generates a signal corresp. to the colour conc. at basic pH and one at acidic pre, means for generating a third signal corresp. to the logarithm of the two previous signals, a detector for the time at which the third signal reaches the equivalence pt. and means for measuring the amt. of electricity used.
FR7304901A 1973-02-12 1973-02-12 Bicarbonate ion determn appts - by photoelectric detection of equivalence point in colorimetric titration Expired FR2218025A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7304901A FR2218025A5 (en) 1973-02-12 1973-02-12 Bicarbonate ion determn appts - by photoelectric detection of equivalence point in colorimetric titration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7304901A FR2218025A5 (en) 1973-02-12 1973-02-12 Bicarbonate ion determn appts - by photoelectric detection of equivalence point in colorimetric titration

Publications (1)

Publication Number Publication Date
FR2218025A5 true FR2218025A5 (en) 1974-09-06

Family

ID=9114694

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7304901A Expired FR2218025A5 (en) 1973-02-12 1973-02-12 Bicarbonate ion determn appts - by photoelectric detection of equivalence point in colorimetric titration

Country Status (1)

Country Link
FR (1) FR2218025A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106124503A (en) * 2016-07-18 2016-11-16 北京矿冶研究总院 Method for detecting concentration of cyanide in ore pulp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106124503A (en) * 2016-07-18 2016-11-16 北京矿冶研究总院 Method for detecting concentration of cyanide in ore pulp

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Legal Events

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ST Notification of lapse